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WO2012066562A2 - Système intelligent de radioprotection pour dispositif mobile destiné à réduire le sar par création d'ombre électromagnétique à accord dynamique dans la direction de l'usager, fonctionnant par détection du milieu environnant du dispositif fondée sur les propriétés, la position, l'orientation, la qualité du signal et les modes exploitation du dispositif - Google Patents

Système intelligent de radioprotection pour dispositif mobile destiné à réduire le sar par création d'ombre électromagnétique à accord dynamique dans la direction de l'usager, fonctionnant par détection du milieu environnant du dispositif fondée sur les propriétés, la position, l'orientation, la qualité du signal et les modes exploitation du dispositif Download PDF

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Publication number
WO2012066562A2
WO2012066562A2 PCT/IN2011/000763 IN2011000763W WO2012066562A2 WO 2012066562 A2 WO2012066562 A2 WO 2012066562A2 IN 2011000763 W IN2011000763 W IN 2011000763W WO 2012066562 A2 WO2012066562 A2 WO 2012066562A2
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WO
WIPO (PCT)
Prior art keywords
radiation
user
antenna
mobile device
proximity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IN2011/000763
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English (en)
Other versions
WO2012066562A3 (fr
Inventor
Muthukumar Prasad
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2012066562A2 publication Critical patent/WO2012066562A2/fr
Publication of WO2012066562A3 publication Critical patent/WO2012066562A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/245—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/006—Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces
    • H01Q15/0066—Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces said selective devices being reconfigurable, tunable or controllable, e.g. using switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3833—Hand-held transceivers
    • H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/11—Monitoring; Testing of transmitters for calibration
    • H04B17/12—Monitoring; Testing of transmitters for calibration of transmit antennas, e.g. of the amplitude or phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
    • H04W52/283—Power depending on the position of the mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
    • H04W52/288—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission taking into account the usage mode, e.g. hands-free, data transmission or telephone

Definitions

  • the present invention is related to mobile communication and particularly to smart directional radiation protection system for wireless mobile devices to protect the user form radiation by forming actively tunable electromagnetic shadow on user facing direction that works mainly by determining or scanning the user device proximity environment also with its property & position sensing, device orientation, operating modes or usage scenarios, signal quality parameters and focus on actively varying and controlling the intensity of radiation facing the user utilising RF/Antenna system capable of achieving dynamic radiation pattern thereby reducing the SAR.
  • mobile phones radiate electromagnetic waves when being used.
  • the antennas in these wireless devices are used for receiving and radiating transmitted signal for communication.
  • These antennas are the source of radiation that are handled close against its users which leads to greater exposure and absorption of radiation by the users head and body. It is not been proved that the generally handled positions of mobile phones to be absolutely safe and is not hazardous.
  • SAR Specific Absorption Rate
  • the mobile device proximity environment and its property plays an important role due to electromagnetic radiations interaction with these environments.
  • the radiation protection designs are not much concerned about detecting user device proximity environment or its property sensing with device orientation to manipulate the radiation pattern which plays an essential role in protecting the user form radiation as well as optimising quality of communication.
  • There are some designs to reduce SAR and the main drawback with these designs that uses power regulator, power governing systems etc are it mainly focus on reducing the overall transmit power levels which in turn reduces the signal strength and the possibility of the signal to reach the base station that affects the quality of communication.
  • Objective of the invention is to protect the user from mobile phone radiations and its adverse health effects simultaneously maintaining the quality of communication.
  • the present invention provides a smart radiation protection system that works by active dynamic radiation pattern approach based on device proximity environment and orientation sensing with corresponding antenna system is presented. Instead of reducing the overall radiated power with other designs to reduce SAR the present invention primarily focus on multi mode dynamic radiation pattern for actively varying, controlling and reducing the intensity of radiation on direction facing the user and accordingly maintaining the radiation on other directions taking signal quality parameters into account to maintain quality of communication. In critical situations like when the signal strength is weak the present invention provides more flexibility than other designs in protecting user as well as enhancing communication by maintaining the radiations on user facing directions according to SAR compliance and standards while altering the intensity on other direction to sustain communication.
  • the protection system not only controls the radiation on user facing direction to reduce SAR [E.g. During direct phone call conversation] but also restores radiation according to parameters and configuration to optimise communication [E.g. speaker mode or hands free or data transfer mode etc].
  • the sensing system scans frequently or based on configurations and usage scenarios. The design can also helps in saving power by focusing the radiated power in right direction and time.
  • the location sensor like proximity or contact sensor will sense the proximity of wireless mobile device to the user with its property [e.g. biological tissue sensing] and position sensing during scenarios like direct phone call conversation and trigger the processing unit.
  • User head and hand hold effects can also be taken into account for computing the trigger signal.
  • the processing unit manipulate the control signal based on trigger and signal quality parameters to determine how the radiation pattern has to be controlled.
  • the directional transmit power controller will direct the RF/antenna system to control the radiation facing the user.
  • the trigger signal is based on usage mode or scenarios like direct call mode, speaker mode or hands free or headset detection, belt pouch or clip sensor, key pad or touch screen detection, Wi-Fi or
  • the processing unit will analyse the corresponding trigger signal from either one or combination of multiple components with signal quality parameters to determine the nature of the control signal to directional transmit power controller.
  • the directional transmit power controller will direct the RF/antenna system accordingly to alter and control the radiation facing the user to reduce the SAR.
  • the sensor system utilises orientation sensors like gyro sensor, accelerometer and similar sensors to actively sense the change in device orientation [as it changes according to usage scenarios] and accordingly align the direction of controlling and reducing of radiation facing the user with RF/antenna system.
  • orientation sensors like gyro sensor, accelerometer and similar sensors to actively sense the change in device orientation [as it changes according to usage scenarios] and accordingly align the direction of controlling and reducing of radiation facing the user with RF/antenna system.
  • FIG. 1 is a diagram illustrating the user body exposure to radiation of wireless mobile device with the dotted lines representing the controlled and reduced radiation on user facing direction as per the present invention.
  • FIG. 2 illustrates the front and top view diagrams of wireless device radiation incident on user head and the dotted lines representing the controlled and reduced radiation on direction facing user head.
  • FIG. 3 illustrates various mobile device usage position models.
  • FIG. 4 illustrates the block diagram of portable wireless device with components of smart radiation protection system designed according to the present invention.
  • FIG. 5 illustrates the flowchart and describes the method of operation of the smart radiation protection system for mobile device according to the present invention.
  • the main aim of the smart directional radiation protection system is to achieve the optimised solution by reducing SAR simultaneously maintaining the quality of
  • the system generally works in real time by varying, controlling and reducing the electromagnetic radiation on user facing direction utilising RF/antenna system 110 in accordance with the signal quality parameters.
  • FIG. 1 illustrates the components of the wireless network according to the present invention consisting of Wireless Mobile device 100, User 170, Base station 190 and the radiation facing the user 180.
  • wireless mobile device 100 radiate electromagnetic waves which are received by the base station 190 to connect with the backbone network.
  • the antenna of the mobile device 100 radiates power widely in all direction. This leads to portion of radiation 180 facing the user 170 to be absorbed by user body which leads to lot of medical complications.
  • the radiation protection system is mainly concerned about controlling and reducing the intensity of radiation 180 facing the user 170 while maintaining the radiation on other directions.
  • the dotted lines in the diagram on user facing direction illustrate the controlling of radiation intensity 180 from wireless device to reduce SAR as per present invention.
  • FIG. 2 illustrates the radiation incident on user head 175 from wireless mobile device 100 with front and top view diagrams and the dotted lines representing the controlled and reduced radiation 180 on direction facing head as per the present invention while maintaining the radiations on other directions.
  • FIG. 3 illustrates various mobile device usage position models. As the mobile handling position and device orientation changes according to usage the smart radiation protection system sense various device proximity usage positions with its orientations and accordingly vary the radiation pattern to reduce SAR.
  • FIG. 4 is a block diagram describing the working principle of smart radiation protection system and the integral components of wireless mobile device 100 as per the present invention. The block diagram gives a brief description about various integral components like antenna system 110, directional transmit power controller 120, sensor system 130, trigger signal 230, interrupt control signal 140, microprocessor 150,
  • RF/transceiver system 160 etc.
  • microprocessor 150 that controls the overall functions of the device.
  • the microprocessor 150 handles lot of operations and the disclosed invention mainly describes about microprocessor 150 interacting with sensor system 130, trigger signal 230, interrupt control signal 140, RF/transceiver system 160, directional transmit power controller 120 etc.
  • the sensor system 130 the sensor system 130
  • the microprocessor 150 determines the proximity of the wireless device 100 to the user 170 utilising proximity sensor and will send the corresponding trigger signal 230 to the microprocessor 150.
  • the microprocessor 150 initiate interrupt service routine based on trigger signal from sensor system 130.
  • the character of trigger signal 230 and transceiver 160 signal quality parameters are utilised by the microprocessor 150 to manipulate the nature of the interrupt control signal 140 to directional transmit power or radiation controller 120.
  • the directional transmit power controller 120 actively controls the radiation on required direction facing the user utilising corresponding RF/antenna system 110.
  • the sensor system utilised are [e.g. proximity or contact sensor] capable of scanning or sensing the property or dielectric nature [permittivity- ⁇ ,
  • Suitable proximity sensor can be utilised for the sensor system, examples are as follows but not limited to electromagnetic or electrostatic sensors, acoustic, inductive, thermal, echo, capacitive, infrared, eddy current etc.
  • the sensor system 130 will determine the change in operating mode or usage scenarios of mobile device by sensing either one or more parameters comprise of direct phone call mode, speaker mode, hands free, headset detection, video call mode, bluetooth mode, belt pouch or clip sensor, key pad or touch screen detection, internet access or download mode, sensing wireless modem mode or data transfer mode, cradle or holder sensor etc and generate the trigger signal 230.
  • the microprocessor 150 computes the control signal 140 to directional radiation controller 120 based on signal from either one or combination of multiple sensors and operating modes simultaneously accounting signal quality parameters from transceiver 160. Based on the interrupt control signal 140 the directional radiation controller 120 will control the RF/antenna systems 110 radiation pattern on user facing direction to protect the user.
  • the trigger signal can also be based on just sensing one parameters for example in direct call mode, mostly the user will use the mobile device proximity to head and this can be taken as a parameter to control the radiations on user facing direction.
  • the sensor system 130 utilises Gyro sensor, accelerometer or similar sensor to actively sense the change in orientation of the wireless mobile device 100 and accordingly control the direction and intensity of radiation on user facing direction.
  • the orientation of the wireless mobile device 100 changes depends on usage scenarios for example during call conversation the user might use the device in different orientation angles and positions like while standing, sitting on a chair, laying on a bed etc, which leads to different orientation of device. So controlling the radiation on user facing direction should also align according to the orientation of the device to efficiently reduce the SAR.
  • the microprocessor 150 Based on the trigger signal 230 from orientation sensors 130 and signal quality parameters from transceiver 160 the microprocessor 150 manipulate the nature of control signal 140 to directional power controller 120.
  • the directional radiation controller 120 controls the RF/antenna systems radiation pattern according to the control signal 140 to protect the user from radiation.
  • the use of this application is not limited to above scenarios but can also be enhanced to others scenarios and combinations not listed here provided the scenarios are within the scope of the present invention.
  • High priority interrupt can be assigned for manipulating the control signal 140 if a general microprocessor is used.
  • a dedicated RF processing unit can be used for the manipulation of control signal 140 to directional radiation power controller 120 or in yet another aspect the directional transmit power controller 120 itself can be used for the manipulation of the control signal 140 by taking corresponding parameters.
  • the smart directional radiation protection system controls the radiation by active multimode variable or dynamic radiation pattern utilising tuneable
  • metamaterials or tunable EBG antenna system 110 that provides variable response and ability to influence the interacting electromagnetic wave to determine whether the EM wave is transmitted, reflected, redirected, absorbed etc.
  • tunable - metamaterials and EBG are most commonly composed of small periodic elements typically built onto circuit boards or assembled using nanofabrication techniques, whose feature size is significantly smaller than the wavelength of the electromagnetic waves they are intended to manipulate.
  • the lattice structure [either one, two or three dimension] of the tuneable metamaterial and EBG is adjusted in real time, making it possible to reconfigure the structure during operation.
  • the antenna design of smart directional radiation protection system works by activating different patterns of tuneable EBG and metamaterial elements that act according to configuration to actively control the radiation intensity in required direction and time. Also the antenna design uses either one or combination of following but not limited to tunable Metamaterials, tunable
  • Electromagnetic Band Gap (EBG), High Impedance Surface (HIS) or Artificial Magnetic Conductor (AMC), Negative Index Material (NIM), periodic arrays, Frequency Selective Surfaces (FSS), Split-ring Resonator (SRR), Micro Electro Mechanical System (MEMS), Computational electromagnetic (CEM) or Electromagnetic modelling, Method of
  • the system can be designed to adopt different multi band antennas with several type of feeding mechanism.
  • the radiation protection system can also be designed with actively tunable electromagnetic shielding screen [E.g. fabricated with tunable metamaterial or EBG] capable of
  • the plasma antennas are capable of achieving dynamic radiation pattern and the advantage of these plasma antennas over mechanical antenna are that the plasma antenna are reconfigurable and can operate at high speeds and has no moving parts.
  • Smart ionized gas plasma antennas use plasma physics to shape and steer the antenna radiation pattern without the need of phased arrays. Electromagnetic radiations can be steered or focused in the reflective or refractive modes using plasmas making it a unique one.
  • Solid state plasma antennas also known as plasma silicon antennas
  • the PSiAN is a cluster of thousands of diodes on a silicon chip that produces a tiny cloud of electrons when charged. Those tiny, dense clouds can reflect high-frequency waves like mirrors, focusing the beams tightly by selectively activating particular diodes.
  • the nature of varying and controlling the intensity of radiation facing the user is based on combination of parameters like usage scenarios or operating modes, user proximity, device orientation and signal quality while limiting the maximum transmit power level as per the compliance with SAR safety guidelines.
  • the change in radiation pattern is balanced and tuned in achieving between least SAR and best signal quality by also accounting received signal parameters so that the quality of communication is not compromised.
  • the instructions regarding how the radiation pattern is altered are pre determined and tested.
  • the design can works in conjunction with change in overall radiated power by taking signal quality parameters into account to maintain the quality of communication while limiting maximum transmit power levels according to compliance & standards. Thus the design reduces the SAR with optimised communication quality.
  • the present invention provides an active dynamic radiation pattern solution that can change and adapt to various radiation pattern which provides the ability to focus the intensity of radiation in required direction and time according to scenarios to protect user from radiation.
  • the phones are designed to have a major radiation pattern on the rear side or other side facing the user and minor radiation pattern on front or user facing direction to reduce SAR also providing
  • the present invention provides a fine tuning and controllable radiation on the user facing direction while maintaining the radiation on other direction that works according to different usage scenarios of mobile device 100 to achieve the balancing between least SAR and best signal quality. Also when the device is not in proximity to the user like device works on speaker mode, used for data transfer or an internet modem, the system will dynamically change its radiation pattern to improve the quality of communication.
  • FIG. 5 is the flowchart of the system describing the method of operation of the design according to the invention.
  • the sensor system 130 determines the change in usage of the device and will accordingly generate the trigger signal 230 when usage & operating mode matches or device proximity to the user.
  • the system determines the state of trigger signal to decide on further action 240.
  • the system analyse the user device proximity with property, position, orientation, operating modes or usage scenarios, DOA and signal quality parameters to compute the best control signal for controlling the directional transmission of radiation to achieve least SAR 250.
  • the antenna system varies and controls the directional transmission & intensity of radiation on the user facing direction to reduce the SAR 260.
  • the trigger signal 230 can vary based on the wireless device proximity to user, usage mode or scenario and orientation of the mobile device. If the phone is not in proximity to the user or not matches other criteria then the wireless device will follow the standard
  • transmission 270 according to preset network transmits configuration and ends with 280.
  • the system helps in reducing the instantaneous and overall SAR, minimising short term and long term effect of radiations with reduced degree of radiation penetration levels thereby reducing the effect of radiation efficiently.
  • This design not only helps in reducing the SAR, but also can reduce the interference with other systems like pacemaker, hearing aid etc.
  • This protection can either be either automatically or manually enabled and disabled with hard or soft switch depends upon the design and usage.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transmitters (AREA)
  • Support Of Aerials (AREA)

Abstract

Le système intelligent de radioprotection directionnelle de l'invention est à la fois un concept et une technique qui protègent l'usager contre les rayonnements émis par un dispositif mobile en créant une ombre électromagnétique à accord dynamique dans la direction de l'usager, au moyen d'une approche diagramme de rayonnement dynamique mise en oeuvre par un système RF/antenne. Le système fonctionne principalement par balayage ou par détection du milieu environnant du dispositif de l'usager fondée sur les propriétés et la position du dispositif, l'orientation du dispositif, l'effet de tenue entre la tête et la main de l'usager, des paramètres de qualité du signal et des modes exploitation, avec éloignement simultané des rayonnements vers d'autres directions pour assurer la continuité de la communication. Le système comprend: a) un ensemble capteurs (130) qui détecte un changement du milieu environnant de l'usager fondé sur les propriétés et la position du dispositif, l'orientation du dispositif, des scénarios d'utilisation ou des modes exploitation, et génère en conséquence le signal de déclenchement (230); b) une unité centrale de traitement qui met en oeuvre le signal de commande d'interruption (140) en fonction du signal de déclenchement, de la sensibilité de l'antenne, de la DOA et des paramètres de qualité du signal; c) un régulateur dynamique de puissance ou de rayonnement d'émission directionnelle (120) qui fonctionne sur la base du signal de commande; d) un système d'antennes [par exemple des antennes métamatériaux ou EBG ou plasma accordables] (110) permettant d'obtenir un diagramme de rayonnement dynamique associé au régulateur de puissance d'émission directionnelle (120) qui bloque le rayonnement dans la direction de l'usager (170) de manière à réduire le SAR, mais aussi rétablit le rayonnement selon des paramètres et des configurations propres à optimiser la communication.
PCT/IN2011/000763 2010-11-16 2011-11-04 Système intelligent de radioprotection pour dispositif mobile destiné à réduire le sar par création d'ombre électromagnétique à accord dynamique dans la direction de l'usager, fonctionnant par détection du milieu environnant du dispositif fondée sur les propriétés, la position, l'orientation, la qualité du signal et les modes exploitation du dispositif Ceased WO2012066562A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN3433CH2010 2010-11-16
IN3433/CHE/2010 2010-11-16

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WO2012066562A3 WO2012066562A3 (fr) 2012-09-13

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Cited By (5)

* Cited by examiner, † Cited by third party
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EP2670054A1 (fr) * 2012-05-31 2013-12-04 Fujitsu Limited Commande de puissance de liaison montante sensible au champ électromagnétique
US20140120958A1 (en) * 2012-10-26 2014-05-01 Fujitsu Limited Positioning device, mobile station and positioning method
CN103905077A (zh) * 2012-12-28 2014-07-02 宏碁股份有限公司 电子装置与其天线调整方法
WO2014187904A1 (fr) * 2013-05-24 2014-11-27 Pyreos Ltd. Dispositif d'actionnement de commutateur, appareil mobile et procédé d'actionnement d'un commutateur par la présence d'une partie émettant de la chaleur
WO2016093746A1 (fr) * 2014-12-08 2016-06-16 Telefonaktiebolaget Lm Ericsson (Publ) Régulation de puissance de transmission d'antenne en fonction de la proximité d'objets d'obstruction

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JP4199697B2 (ja) * 2004-05-31 2008-12-17 パナソニック株式会社 携帯無線機
US7304976B2 (en) * 2004-10-13 2007-12-04 Virginia Tech Intellectual Properties, Inc. Method and apparatus for control and routing of wireless sensor networks
CN101043234B (zh) * 2006-03-21 2010-06-09 普天信息技术研究院 智能天线仿真系统中上下行功率控制的实现方法
CN101750547B (zh) * 2009-07-08 2011-11-30 中国科学院自动化研究所 一种读写器天线等功率线的测量系统及测量方法

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2670054A1 (fr) * 2012-05-31 2013-12-04 Fujitsu Limited Commande de puissance de liaison montante sensible au champ électromagnétique
US20140120958A1 (en) * 2012-10-26 2014-05-01 Fujitsu Limited Positioning device, mobile station and positioning method
US9229091B2 (en) * 2012-10-26 2016-01-05 Fujitsu Limited Positioning device, mobile station and positioning method
CN103905077A (zh) * 2012-12-28 2014-07-02 宏碁股份有限公司 电子装置与其天线调整方法
CN103905077B (zh) * 2012-12-28 2016-06-22 宏碁股份有限公司 电子装置与其天线调整方法
WO2014187904A1 (fr) * 2013-05-24 2014-11-27 Pyreos Ltd. Dispositif d'actionnement de commutateur, appareil mobile et procédé d'actionnement d'un commutateur par la présence d'une partie émettant de la chaleur
CN105531931A (zh) * 2013-05-24 2016-04-27 派洛斯有限公司 开关启动设备、移动装置、及用于通过发热部位的存在启动开关的方法
US9857880B2 (en) 2013-05-24 2018-01-02 Pyreos Ltd. Switch operating device, mobile device and method for operating a switch by a presence of a part emitting heat
WO2016093746A1 (fr) * 2014-12-08 2016-06-16 Telefonaktiebolaget Lm Ericsson (Publ) Régulation de puissance de transmission d'antenne en fonction de la proximité d'objets d'obstruction

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